3. What consists the EM spectrum?

A. The EM spectrum consists the 7 regions of the EM waves with wavelengths arranged in descending order
B. The EM spectrurn consists of red, orange, yellow, green, blue, indigo and violet
C. The EM spectrum shows that the EM waves has varying use
D. The EM spectrum is an example of a wave that travels at the speed of light


4. Which of the following statements is correct?

A. The EM spectrum validates the idea that energy may increase or decrease with respect to the speed of the wave
B. The EM spectrum shows that EM waves are produced from electrons
C. The EM spectrum shows that gamma rays having the shortest wavelength has the greatest energy and frequency
D. The EM spectrum describes the importance of EM waves


5. What can be inferred from the arrangement of the colors of light below
Red - yellow - blue - violet

A. Increasing energy
C. varying colors
B. Decreasing wavelength
D. increasing wavelength ​